<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <button>点击</button>
    <script type="module">
        import {num} from "./a.js";
        console.log(num);
        document.querySelector("button").onclick=()=>{
            //import 作为一个函数使用,参数为地址
            import("./b.js").then(res=>{
                console.log(res);
                console.log(res.default);
            })
            
            }
        
    </script>
</body>

</html>